Ortiz's grandmother, said relatives are mystified and want answers. This supposedly happened on Sunday in broad daylight. This could n't have happened during the day and only a few steps from Reforma Avenue without anybody noticing. There should be surveillance cameras that can show us exactly what happened, Ramos said. Maria del Carmen Zamudio, another relative at the protest, said the witness told them the young people were all suddenly told to leave. The -LRB- bar -RRB- owner apparently told them that there was going to be a police operation and turned the lights off. He told them to get out, and armed men in black SUVs were already waiting for them outside, Zamudio said. Police say there was no such operation. Mexico City Mayor Miguel Angel Mancera said authorities are treating the incident as a missing-person case because so far, there's no evidence the young people were kidnapped. For now, we have n't been able to confirm how this happened or the specific location where -LRB- these young people -RRB- were kidnapped. What we have is a missing persons report and the knowledge that they 're missing. We have to do something to find them, Mancera said. Inside San Pedro Sula, the murder capitalof the world Mexico City District Attorney Rodolfo Rios Garza said security cameras at the bar were not working, but authorities are relying on city cameras in the neighborhood. So